TypeScript Best Practices for MVP Development

TypeScript is not about perfectionism. It is about catching mistakes before users do. For MVPs, the goal is useful types at the boundaries — API responses, database models, and shared domain objects.

Type the edges first

Start with request handlers, server actions, and external service clients. Internal helper functions can stay loosely typed until patterns stabilize.

Keep strict mode on

strict mode pays off quickly in teams that iterate fast. The upfront friction is smaller than debugging production type mismatches.

Avoid premature abstraction

Generic utility types and deep inheritance trees slow MVPs. Prefer plain interfaces and narrow unions that match real product states.